package demo1;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: asus
 * Date: 2024-12-10
 * Time: 17:52
 */

import java.util.Stack;

/**
 * 两个栈来实现一个队列
 */
public class Main {
    Stack<Integer> stack1 = new Stack<Integer>();
    Stack<Integer> stack2 = new Stack<Integer>();

    public void push(int node) {
        stack1.push(node);
    }

    public int pop() {
        while (!stack1.isEmpty()) {
            stack2.push(stack1.pop());
        }
        int ret = stack2.pop();
        while (!stack2.isEmpty()) {
            stack1.push(stack2.pop());
        }
        return ret;
    }
}
